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-- text object matching a lexer token
local MAX_CONTEXT = 32768
vis:textobject_new("ii", function(win, pos)
if not win.syntax or not vis.lexers.load then
return nil
end
local before, after = pos - MAX_CONTEXT, pos + MAX_CONTEXT
if before < 0 then
before = 0
end
-- TODO make sure we start at a line boundary?
local lexer = vis.lexers.load(win.syntax, nil, true)
local data = win.file:content(before, after - before)
local tokens = lexer:lex(data)
local cur = before
for i = 1, #tokens, 2 do
local token_next = before + tokens[i+1] - 1
if cur <= pos and pos < token_next then
return cur, token_next
end
cur = token_next
end
return nil
end, "Current lexer token")
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